<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<h2>外部JavaScript</h2>
		<button type="button" onclick="myFunction()">试一试</button>
		<p id="demo">加油</p>
		<script src="myFunction.js"></script>
	</body>
</html>
